The survivors drifted at sea and a tankership seems deserted. But it's filled with infected.
The survivors must try to restart the tankership motor, if they want to join the oil plateform where a helicopter was heading.
excuse my poor english ;)

PROS : Poster
Fun
Good tanker ship design
Interesting and decent layout/texture
No bug
Exellent items/ammo,atmosphere setting
Proper difficulty
Random paths and events
Creative events
Great tower design in finale area
CONS : No spawn special hordes in overall level 1 map (maybe they would got stucks or glitches at some areas)
Not good tanks/witches spawn directions (when i play this map, tank spawned front of start saferoom in level 4)
Bots and special hordes get stucks some areas (specially ladders)

Good map overall, using both a tanker and oil rig for the environments.
Not swamped with supplies, but enough to get you through if you wisely use your ammo and health.
Quite frankly, it is really the only time I can see the oil/gas barrels having a purpose....there are quite a number of them around, but it is totally acceptable because of the environment.
The aesthetics of the entire game are very good. Being near the edge on the floors while on the oil rig gave me vertigo.

Cons

The bots, or the bot navigation. Each time I had to jump over the edge of the ship to get to the oil rig, the bots constantly got hung up, and usually ended up dying. This happened a few times throughout the map, always leading to the death of one or more bots (the final can be the death of all three bots). Extremely frustrating.
No ocean sounds (seagulls, water breaking, etc.). The environment would have been better if the sounds had been there.
There is really no damage anywhere on the tanker ship or oil rig. A minor detail for sure, but something that one would expect in an apocalyptic game.

A very good map that uses its limited space extremely well. The whole story takes place on a tanker ship and oil rig, but it seems very large, which is good.
The only thing that is really keeping this map from being a classic is the navigation of the bots. I know I've said it before, but it is worth repeating. Nevertheless, it is an exciting map, and it is one that you should have in your Left 4 Dead collection

-- Levels are very well structured, with choke-points and good holdout spots aplenty.
-- Navigation isn't just a matter of w + m1, but levels were never obtuse or confusing.
-- Just enough spawned goodies to get by, no more or less.
-- Creative events.
-- You can climb the tower. :)
-- Great atmosphere on first and third maps.
-- Finale requires you to think about positioning rather than just camping the first spot everyone stands still in.
-- Hard, but didn't feel unfair out of a couple of places.
-- Map 2's second and/or third event . . . KA-BOOM!

Cons

-- The bot nav. Oh lordy. They don't properly jump off the ledge to get to the map 2 saferoom, causing them to get stuck on it about 6 times out of ten. (I counted.) Francis and Bill decided to park their rears at the base of the lift during the map 3 crescendo, leading to Zoey's death. Then they decided to stand there until the event was full over, causing them to die while I (20 hp) waited in the safe room. Then in the finale they bumrushed the extraction point and got super-saiyaned off the platform by the tank.
-- I like the finale in general. It's dangerous, you have to hunt for supplies, you pretty much have to think about what angles you want to hold if you want to live-- and if you do, it's mostly a piece of cake, with very little you can't adapt to. Then the chopper arrives. I like the tank spawning on top of the platform-- it's a dangerous place, no logical reason to camp there -- but the full contingent of SI and giant mob of SI . . . those are a bit less fair.

There are some things that I don't like about the map, but I had too much fun to rate it any lower than an 8. Probably won't be easy-peasy lemon-squeezy on any difficulty, but if you don't mind both thinking ahead and reacting quickly, I'd call it one of the best for L4D1.

PROS : Poster
Fun
Good tanker ship design
Interesting and decent layout/texture
No bug
Exellent items/ammo,atmosphere setting
Proper difficulty
Random paths and events
Creative events
Great tower design in finale area
CONS : No spawn special hordes in overall level 1 map (maybe they would got stucks or glitches at some areas)
Not good tanks/witches spawn directions (when i play this map, tank spawned front of start saferoom in level 4)
Bots and special hordes get stucks some areas (specially ladders)

Good map overall, using both a tanker and oil rig for the environments.
Not swamped with supplies, but enough to get you through if you wisely use your ammo and health.
Quite frankly, it is really the only time I can see the oil/gas barrels having a purpose....there are quite a number of them around, but it is totally acceptable because of the environment.
The aesthetics of the entire game are very good. Being near the edge on the floors while on the oil rig gave me vertigo.

Cons

The bots, or the bot navigation. Each time I had to jump over the edge of the ship to get to the oil rig, the bots constantly got hung up, and usually ended up dying. This happened a few times throughout the map, always leading to the death of one or more bots (the final can be the death of all three bots). Extremely frustrating.
No ocean sounds (seagulls, water breaking, etc.). The environment would have been better if the sounds had been there.
There is really no damage anywhere on the tanker ship or oil rig. A minor detail for sure, but something that one would expect in an apocalyptic game.

A very good map that uses its limited space extremely well. The whole story takes place on a tanker ship and oil rig, but it seems very large, which is good.
The only thing that is really keeping this map from being a classic is the navigation of the bots. I know I've said it before, but it is worth repeating. Nevertheless, it is an exciting map, and it is one that you should have in your Left 4 Dead collection

-- Levels are very well structured, with choke-points and good holdout spots aplenty.
-- Navigation isn't just a matter of w + m1, but levels were never obtuse or confusing.
-- Just enough spawned goodies to get by, no more or less.
-- Creative events.
-- You can climb the tower. :)
-- Great atmosphere on first and third maps.
-- Finale requires you to think about positioning rather than just camping the first spot everyone stands still in.
-- Hard, but didn't feel unfair out of a couple of places.
-- Map 2's second and/or third event . . . KA-BOOM!

Cons

-- The bot nav. Oh lordy. They don't properly jump off the ledge to get to the map 2 saferoom, causing them to get stuck on it about 6 times out of ten. (I counted.) Francis and Bill decided to park their rears at the base of the lift during the map 3 crescendo, leading to Zoey's death. Then they decided to stand there until the event was full over, causing them to die while I (20 hp) waited in the safe room. Then in the finale they bumrushed the extraction point and got super-saiyaned off the platform by the tank.
-- I like the finale in general. It's dangerous, you have to hunt for supplies, you pretty much have to think about what angles you want to hold if you want to live-- and if you do, it's mostly a piece of cake, with very little you can't adapt to. Then the chopper arrives. I like the tank spawning on top of the platform-- it's a dangerous place, no logical reason to camp there -- but the full contingent of SI and giant mob of SI . . . those are a bit less fair.

There are some things that I don't like about the map, but I had too much fun to rate it any lower than an 8. Probably won't be easy-peasy lemon-squeezy on any difficulty, but if you don't mind both thinking ahead and reacting quickly, I'd call it one of the best for L4D1.